1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
|
/* Copyright (c) 2001-2004, Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2021, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#include "orconfig.h"
#define ONION_NTOR_V3_PRIVATE
#include "core/or/or.h"
#include "test/test.h"
#include "lib/crypt_ops/crypto_curve25519.h"
#include "lib/crypt_ops/crypto_ed25519.h"
#include "core/crypto/onion_ntor_v3.h"
#include "core/crypto/onion_crypto.h"
#include "core/or/extend_info_st.h"
#include "core/or/crypt_path_st.h"
#define TOR_CONGESTION_CONTROL_PRIVATE
#define TOR_CONGESTION_CONTROL_COMMON_PRIVATE
#include "core/or/congestion_control_st.h"
#include "core/or/congestion_control_common.h"
#include "app/config/config.h"
#define unhex(arry, s) \
{ tt_int_op(sizeof(arry), OP_EQ, \
base16_decode((char*)arry, sizeof(arry), s, strlen(s))); \
}
static void
test_ntor3_testvecs(void *arg)
{
(void)arg;
char *mem_op_hex_tmp = NULL; // temp val to make test_memeq_hex work.
ntor3_server_handshake_state_t *relay_state = NULL;
uint8_t *onion_skin = NULL;
size_t onion_skin_len;
ntor3_handshake_state_t *client_state = NULL;
uint8_t *cm = NULL, *sm = NULL;
size_t cm_len, sm_len;
di_digest256_map_t *private_keys = NULL;
uint8_t *server_handshake = NULL;
size_t server_handshake_len;
// Test vectors from python implementation, confirmed with rust
// implementation.
curve25519_keypair_t relay_keypair_b;
curve25519_keypair_t client_keypair_x;
curve25519_keypair_t relay_keypair_y;
ed25519_public_key_t relay_id;
unhex(relay_keypair_b.seckey.secret_key,
"4051daa5921cfa2a1c27b08451324919538e79e788a81b38cbed097a5dff454a");
unhex(relay_keypair_b.pubkey.public_key,
"f8307a2bc1870b00b828bb74dbb8fd88e632a6375ab3bcd1ae706aaa8b6cdd1d");
unhex(relay_id.pubkey,
"9fad2af287ef942632833d21f946c6260c33fae6172b60006e86e4a6911753a2");
unhex(client_keypair_x.seckey.secret_key,
"b825a3719147bcbe5fb1d0b0fcb9c09e51948048e2e3283d2ab7b45b5ef38b49");
unhex(client_keypair_x.pubkey.public_key,
"252fe9ae91264c91d4ecb8501f79d0387e34ad8ca0f7c995184f7d11d5da4f46");
unhex(relay_keypair_y.seckey.secret_key,
"4865a5b7689dafd978f529291c7171bc159be076b92186405d13220b80e2a053");
unhex(relay_keypair_y.pubkey.public_key,
"4bf4814326fdab45ad5184f5518bd7fae25dc59374062698201a50a22954246d");
uint8_t client_message[11];
uint8_t verification[5];
unhex(client_message, "68656c6c6f20776f726c64");
unhex(verification, "78797a7a79");
// ========= Client handshake 1.
onion_skin_ntor3_create_nokeygen(
&client_keypair_x,
&relay_id,
&relay_keypair_b.pubkey,
verification,
sizeof(verification),
client_message,
sizeof(client_message),
&client_state,
&onion_skin,
&onion_skin_len);
const char expect_client_handshake[] = "9fad2af287ef942632833d21f946c6260c"
"33fae6172b60006e86e4a6911753a2f8307a2bc1870b00b828bb74dbb8fd88e632a6375"
"ab3bcd1ae706aaa8b6cdd1d252fe9ae91264c91d4ecb8501f79d0387e34ad8ca0f7c995"
"184f7d11d5da4f463bebd9151fd3b47c180abc9e044d53565f04d82bbb3bebed3d06cea"
"65db8be9c72b68cd461942088502f67";
tt_int_op(onion_skin_len, OP_EQ, strlen(expect_client_handshake)/2);
test_memeq_hex(onion_skin, expect_client_handshake);
// ========= Relay handshake.
dimap_add_entry(&private_keys,
relay_keypair_b.pubkey.public_key,
&relay_keypair_b);
int r = onion_skin_ntor3_server_handshake_part1(
private_keys,
&client_keypair_x,
&relay_id,
onion_skin,
onion_skin_len,
verification,
sizeof(verification),
&cm,
&cm_len,
&relay_state);
tt_int_op(r, OP_EQ, 0);
tt_int_op(cm_len, OP_EQ, sizeof(client_message));
tt_mem_op(cm, OP_EQ, client_message, cm_len);
uint8_t server_message[10];
unhex(server_message, "486f6c61204d756e646f");
uint8_t server_keys[256];
onion_skin_ntor3_server_handshake_part2_nokeygen(
&relay_keypair_y,
relay_state,
verification,
sizeof(verification),
server_message,
sizeof(server_message),
&server_handshake,
&server_handshake_len,
server_keys,
sizeof(server_keys));
const char expect_server_handshake[] = "4bf4814326fdab45ad5184f5518bd7fae25"
"dc59374062698201a50a22954246d2fc5f8773ca824542bc6cf6f57c7c29bbf4e5476461"
"ab130c5b18ab0a91276651202c3e1e87c0d32054c";
tt_int_op(server_handshake_len, OP_EQ, strlen(expect_server_handshake)/2);
test_memeq_hex(server_handshake, expect_server_handshake);
uint8_t expect_keys[256];
unhex(expect_keys, "9c19b631fd94ed86a817e01f6c80b0743a43f5faebd39cfaa8b00f"
"a8bcc65c3bfeaa403d91acbd68a821bf6ee8504602b094a254392a07737d5662768"
"c7a9fb1b2814bb34780eaee6e867c773e28c212ead563e98a1cd5d5b4576f5ee61c"
"59bde025ff2851bb19b721421694f263818e3531e43a9e4e3e2c661e2ad547d8984"
"caa28ebecd3e4525452299be26b9185a20a90ce1eac20a91f2832d731b54502b097"
"49b5a2a2949292f8cfcbeffb790c7790ed935a9d251e7e336148ea83b063a5618fc"
"ff674a44581585fd22077ca0e52c59a24347a38d1a1ceebddbf238541f226b8f88d"
"0fb9c07a1bcd2ea764bbbb5dacdaf5312a14c0b9e4f06309b0333b4a");
tt_mem_op(server_keys, OP_EQ, expect_keys, 256);
// ===== Client handshake 2
uint8_t client_keys[256];
r = onion_ntor3_client_handshake(
client_state,
server_handshake,
server_handshake_len,
verification,
sizeof(verification),
client_keys,
sizeof(client_keys),
&sm,
&sm_len);
tt_int_op(r, OP_EQ, 0);
tt_int_op(sm_len, OP_EQ, sizeof(server_message));
tt_mem_op(sm, OP_EQ, server_message, sizeof(server_message));
tt_mem_op(client_keys, OP_EQ, server_keys, 256);
done:
tor_free(onion_skin);
tor_free(server_handshake);
tor_free(mem_op_hex_tmp);
ntor3_handshake_state_free(client_state);
ntor3_server_handshake_state_free(relay_state);
tor_free(cm);
tor_free(sm);
dimap_free(private_keys, NULL);
}
static void
run_full_handshake(circuit_params_t *serv_params_in,
circuit_params_t *client_params_out,
circuit_params_t *serv_params_out)
{
extend_info_t info = {0};
uint8_t onionskin[CELL_PAYLOAD_SIZE];
int onionskin_len = 0;
int reply_len = 0;
onion_handshake_state_t handshake_state = {0};
server_onion_keys_t server_keys = {0};
curve25519_keypair_t relay_onion_key;
uint8_t serv_reply[CELL_PAYLOAD_SIZE];
uint8_t serv_keys[100];
uint8_t rend_nonce[DIGEST_LEN];
uint8_t client_keys[CELL_PAYLOAD_SIZE];
uint8_t rend_auth[DIGEST_LEN];
info.exit_supports_congestion_control = 1;
unhex(relay_onion_key.seckey.secret_key,
"4051daa5921cfa2a1c27b08451324919538e79e788a81b38cbed097a5dff454a");
unhex(relay_onion_key.pubkey.public_key,
"f8307a2bc1870b00b828bb74dbb8fd88e632a6375ab3bcd1ae706aaa8b6cdd1d");
memcpy(&info.curve25519_onion_key,
&relay_onion_key.pubkey, sizeof(info.curve25519_onion_key));
unhex(info.ed_identity.pubkey,
"9fad2af287ef942632833d21f946c6260c33fae6172b60006e86e4a6911753a2");
memcpy(&server_keys.my_ed_identity, &info.ed_identity,
sizeof(server_keys.my_ed_identity));
dimap_add_entry(&server_keys.curve25519_key_map,
relay_onion_key.pubkey.public_key,
&relay_onion_key);
onionskin_len = onion_skin_create(ONION_HANDSHAKE_TYPE_NTOR_V3, &info,
&handshake_state, onionskin,
sizeof(onionskin));
tt_int_op(onionskin_len, OP_NE, -1);
server_keys.junk_keypair = &handshake_state.u.ntor3->client_keypair;
reply_len = onion_skin_server_handshake(ONION_HANDSHAKE_TYPE_NTOR_V3,
onionskin, onionskin_len,
&server_keys, serv_params_in,
serv_reply, sizeof(serv_reply),
serv_keys, sizeof(serv_keys),
rend_nonce, serv_params_out);
tt_int_op(reply_len, OP_NE, -1);
tt_int_op(onion_skin_client_handshake(ONION_HANDSHAKE_TYPE_NTOR_V3,
&handshake_state,
serv_reply, reply_len,
client_keys, sizeof(client_keys),
rend_auth, client_params_out,
NULL), OP_EQ, 0);
done:
dimap_free(server_keys.curve25519_key_map, NULL);
ntor3_handshake_state_free(handshake_state.u.ntor3);
return;
}
/**
* Test congestion control negotiation logic.
*
* This tests that congestion control is only enabled when both
* client and server agree, via consensus param or torrc.
*
* It also tests that when they agree, they agree on the server's
* version of sendme_inc.
*/
static void
test_ntor3_handshake(void *arg)
{
(void)arg;
circuit_params_t client_params, serv_params, serv_ns_params;
serv_ns_params.sendme_inc_cells = congestion_control_sendme_inc();
/* client off, serv off -> off */
serv_ns_params.cc_enabled = 0;
run_full_handshake(&serv_ns_params, &client_params, &serv_params);
tt_int_op(client_params.cc_enabled, OP_EQ, 0);
tt_int_op(serv_params.cc_enabled, OP_EQ, 0);
/* client off, serv on -> off */
congestion_control_set_cc_disabled();
serv_ns_params.cc_enabled = 1;
run_full_handshake(&serv_ns_params, &client_params, &serv_params);
tt_int_op(client_params.cc_enabled, OP_EQ, 0);
tt_int_op(serv_params.cc_enabled, OP_EQ, 0);
/* client off + param, serv on -> on */
serv_ns_params.cc_enabled = 1;
get_options_mutable()->AlwaysCongestionControl = 1;
run_full_handshake(&serv_ns_params, &client_params, &serv_params);
tt_int_op(client_params.cc_enabled, OP_EQ, 1);
tt_int_op(serv_params.cc_enabled, OP_EQ, 1);
/* client on, serv off -> off */
serv_ns_params.cc_enabled = 0;
congestion_control_set_cc_enabled();
run_full_handshake(&serv_ns_params, &client_params, &serv_params);
tt_int_op(client_params.cc_enabled, OP_EQ, 0);
tt_int_op(serv_params.cc_enabled, OP_EQ, 0);
/* client on, serv on -> on */
serv_ns_params.cc_enabled = 1;
run_full_handshake(&serv_ns_params, &client_params, &serv_params);
tt_int_op(client_params.cc_enabled, OP_EQ, 1);
tt_int_op(serv_params.cc_enabled, OP_EQ, 1);
/* client on, serv on, sendme_inc diff -> serv sendme_inc */
serv_ns_params.cc_enabled = 1;
serv_ns_params.sendme_inc_cells += 1;
run_full_handshake(&serv_ns_params, &client_params, &serv_params);
tt_int_op(client_params.cc_enabled, OP_EQ, 1);
tt_int_op(serv_params.cc_enabled, OP_EQ, 1);
tt_int_op(serv_params.sendme_inc_cells, OP_EQ,
client_params.sendme_inc_cells);
tt_int_op(client_params.sendme_inc_cells, OP_EQ,
serv_ns_params.sendme_inc_cells);
tt_int_op(client_params.sendme_inc_cells, OP_NE,
congestion_control_sendme_inc());
done:
return;
}
struct testcase_t ntor_v3_tests[] = {
{ "testvecs", test_ntor3_testvecs, 0, NULL, NULL, },
{ "handshake_negtotiation", test_ntor3_handshake, 0, NULL, NULL, },
END_OF_TESTCASES,
};
|
